Improve Python 3 compat: threading WIP

Should fix GH eventlet#153 "py3: green.threading.local is not green"

eventlet/green/thread.py

@@ -1,6 +1,6 @@
 """Implements the standard thread module, using greenthreads."""
 from eventlet.support.six.moves import _thread as __thread
-from eventlet.support import greenlets as greenlet
+from eventlet.support import greenlets as greenlet, six
 from eventlet import greenthread
 from eventlet.semaphore import Semaphore as LockType
 
@@ -13,6 +13,16 @@
 __threadcount = 0
 
 
+if six.PY3:
+    def _set_sentinel():
+        # HACK this is dummy code
+        # TODO possibly reimplement this:
+        # https://hg.python.org/cpython/file/b5e9bc4352e1/Modules/_threadmodule.c#l1203
+        return allocate_lock()
+
+    TIMEOUT_MAX = __thread.TIMEOUT_MAX
+
+
 def _count():
     return __threadcount
 

eventlet/green/threading.py

@@ -2,20 +2,25 @@
 from eventlet import patcher
 from eventlet.green import thread
 from eventlet.green import time
-from eventlet.support import greenlets as greenlet
+from eventlet.support import greenlets as greenlet, six
 
-__patched__ = ['_start_new_thread', '_allocate_lock', '_get_ident', '_sleep',
-               'local', 'stack_size', 'Lock', 'currentThread',
+__patched__ = ['_start_new_thread', '_allocate_lock',
+               '_sleep', 'local', 'stack_size', 'Lock', 'currentThread',
                'current_thread', '_after_fork', '_shutdown']
 
+if six.PY2:
+    __patched__ += ['_get_ident']
+else:
+    __patched__ += ['get_ident', '_set_sentinel']
+
 __orig_threading = patcher.original('threading')
 __threadlocal = __orig_threading.local()
 
 
 patcher.inject(
     'threading',
     globals(),
-    ('thread', thread),
+    ('thread' if six.PY2 else '_thread', thread),
     ('time', time))
 
 del patcher